Whiteside 2715 Combination Flush Trim Bit 1/2" Shank 7/8" Cut Dia. 1-1/2" Cut Length1 2"SH, 7 8"CD, 1 1 2"CL Combination flush trim bits have a bearing on both ends of the cutting edge. This configuration allows the user to pick which side they want the template placed. The cutting edge is flush to the bearings which produces the precise edge to your template. Materials: Natural woods, composite woods, hard plastics, thin aluminum Recommended RPM: 14,000 16,000 (max 18,000)